Windows 10: DPC Latency problems

Discus and support DPC Latency problems in Windows 10 BSOD Crashes and Debugging to solve the problem; Hi, over the last few days out of the blue I started to hear weird crackling and popping noises during video and audio playback, I tried to investigate... Discussion in 'Windows 10 BSOD Crashes and Debugging' started by HarryMecha, Nov 30, 2020.

  1. DPC Latency problems


    Hi, over the last few days out of the blue I started to hear weird crackling and popping noises during video and audio playback, I tried to investigate and check to see what the problem was myself, I stumbled upon LatencyMon that test DPC Latency, seems that my problem is due to my ndis.sys having an incredibly long DPC routine execution time, I have updated the BIOS and every driver I could find related to the issue but it doesn't seem to fix it, whenever I think it's getting better I have massive spikes. Here's the stats from LatencyMon after I ran it for 20 minutes:

    _________________________________________________________________________________________________________

    CONCLUSION

    _________________________________________________________________________________________________________

    Your system appears to be having trouble handling real-time audio and other tasks. You are likely to experience buffer underruns appearing as drop outs, clicks or pops. One or more DPC routines that belong to

    a driver running in your system appear to be executing for too long. At least one detected problem appears to be network related. In case you are using a WLAN adapter, try disabling it to get better results.

    One problem may be related to power management, disable CPU throttling settings in Control Panel and BIOS setup. Check for BIOS updates.

    LatencyMon has been analyzing your system for 0:21:48 h:mm:ss on all processors.





    _________________________________________________________________________________________________________

    SYSTEM INFORMATION

    _________________________________________________________________________________________________________

    Computer name: HARRY-LAPTOP

    OS version: Windows 10, 10.0, version 1909, build: 18363 x64

    Hardware: Strix GL703GM_GL703GM, ASUSTeK COMPUTER INC.

    CPU: GenuineIntel IntelR CoreTM i7-8750H CPU @ 2.20GHz

    Logical processors: 12

    Processor groups: 1

    RAM: 16306 MB total





    _________________________________________________________________________________________________________

    CPU SPEED

    _________________________________________________________________________________________________________

    Reported CPU speed: 2208 MHz



    Note: reported execution times may be calculated based on a fixed reported CPU speed. Disable variable speed settings like Intel Speed Step and AMD Cool N Quiet in the BIOS setup for more accurate results.





    _________________________________________________________________________________________________________

    MEASURED INTERRUPT TO USER PROCESS LATENCIES

    _________________________________________________________________________________________________________

    The interrupt to process latency reflects the measured interval that a usermode process needed to respond to a hardware request from the moment the interrupt service routine started execution. This includes

    the scheduling and execution of a DPC routine, the signaling of an event and the waking up of a usermode thread from an idle wait state in response to that event.



    Highest measured interrupt to process latency µs: 122400.70

    Average measured interrupt to process latency µs: 7.419329



    Highest measured interrupt to DPC latency µs: 122396.20

    Average measured interrupt to DPC latency µs: 4.169295





    _________________________________________________________________________________________________________

    REPORTED ISRs

    _________________________________________________________________________________________________________

    Interrupt service routines are routines installed by the OS and device drivers that execute in response to a hardware interrupt signal.



    Highest ISR routine execution time µs: 209.755435

    Driver with highest ISR routine execution time: Wdf01000.sys - Kernel Mode Driver Framework Runtime, Microsoft Corporation



    Highest reported total ISR routine time %: 0.015845

    Driver with highest ISR total time: HDAudBus.sys - High Definition Audio Bus Driver, Microsoft Corporation



    Total time spent in ISRs % 0.020728



    ISR count execution time <250 µs: 548734

    ISR count execution time 250-500 µs: 0

    ISR count execution time 500-1000 µs: 0

    ISR count execution time 1000-2000 µs: 0

    ISR count execution time 2000-4000 µs: 0

    ISR count execution time >=4000 µs: 0





    _________________________________________________________________________________________________________

    REPORTED DPCs

    _________________________________________________________________________________________________________

    DPC routines are part of the interrupt servicing dispatch mechanism and disable the possibility for a process to utilize the CPU while it is interrupted until the DPC has finished execution.



    Highest DPC routine execution time µs: 122425.470109

    Driver with highest DPC routine execution time: ndis.sys - Network Driver Interface Specification NDIS, Microsoft Corporation



    Highest reported total DPC routine time %: 0.048005

    Driver with highest DPC total execution time: nvlddmkm.sys - NVIDIA Windows Kernel Mode Driver, Version 457.30 , NVIDIA Corporation



    Total time spent in DPCs % 0.166279



    DPC count execution time <250 µs: 4302105

    DPC count execution time 250-500 µs: 0

    DPC count execution time 500-10000 µs: 713

    DPC count execution time 1000-2000 µs: 78

    DPC count execution time 2000-4000 µs: 67

    DPC count execution time >=4000 µs: 138





    _________________________________________________________________________________________________________

    REPORTED HARD PAGEFAULTS

    _________________________________________________________________________________________________________

    Hard pagefaults are events that get triggered by making use of virtual memory that is not resident in RAM but backed by a memory mapped file on disk. The process of resolving the hard pagefault requires

    reading in the memory from disk while the process is interrupted and blocked from execution.



    NOTE: some processes were hit by hard pagefaults. If these were programs producing audio, they are likely to interrupt the audio stream resulting in dropouts, clicks and pops. Check the Processes tab to see

    which programs were hit.



    Process with highest pagefault count: microsoft.photos.exe



    Total number of hard pagefaults 10556

    Hard pagefault count of hardest hit process: 6253

    Number of processes hit: 44





    _________________________________________________________________________________________________________

    PER CPU DATA

    _________________________________________________________________________________________________________

    CPU 0 Interrupt cycle time s: 126.113859

    CPU 0 ISR highest execution time µs: 198.145833

    CPU 0 ISR total execution time s: 3.198229

    CPU 0 ISR count: 541574

    CPU 0 DPC highest execution time µs: 122425.470109

    CPU 0 DPC total execution time s: 24.632331

    CPU 0 DPC count: 4159514

    _________________________________________________________________________________________________________

    CPU 1 Interrupt cycle time s: 77.443007

    CPU 1 ISR highest execution time µs: 209.755435

    CPU 1 ISR total execution time s: 0.056558

    CPU 1 ISR count: 7160

    CPU 1 DPC highest execution time µs: 304.701087

    CPU 1 DPC total execution time s: 0.126696

    CPU 1 DPC count: 7521

    _________________________________________________________________________________________________________

    CPU 2 Interrupt cycle time s: 63.823917

    CPU 2 ISR highest execution time µs: 0.0

    CPU 2 ISR total execution time s: 0.0

    CPU 2 ISR count: 0

    CPU 2 DPC highest execution time µs: 14326.753623

    CPU 2 DPC total execution time s: 0.231130

    CPU 2 DPC count: 26235

    _________________________________________________________________________________________________________

    CPU 3 Interrupt cycle time s: 71.681187

    CPU 3 ISR highest execution time µs: 0.0

    CPU 3 ISR total execution time s: 0.0

    CPU 3 ISR count: 0

    CPU 3 DPC highest execution time µs: 177.130435

    CPU 3 DPC total execution time s: 0.025402

    CPU 3 DPC count: 5898

    _________________________________________________________________________________________________________

    CPU 4 Interrupt cycle time s: 57.713981

    CPU 4 ISR highest execution time µs: 0.0

    CPU 4 ISR total execution time s: 0.0

    CPU 4 ISR count: 0

    CPU 4 DPC highest execution time µs: 86622.771739

    CPU 4 DPC total execution time s: 0.579870

    CPU 4 DPC count: 34002

    _________________________________________________________________________________________________________

    CPU 5 Interrupt cycle time s: 69.124442

    CPU 5 ISR highest execution time µs: 0.0

    CPU 5 ISR total execution time s: 0.0

    CPU 5 ISR count: 0

    CPU 5 DPC highest execution time µs: 158.599638

    CPU 5 DPC total execution time s: 0.012482

    CPU 5 DPC count: 3622

    _________________________________________________________________________________________________________

    CPU 6 Interrupt cycle time s: 57.571521

    CPU 6 ISR highest execution time µs: 0.0

    CPU 6 ISR total execution time s: 0.0

    CPU 6 ISR count: 0

    CPU 6 DPC highest execution time µs: 479.868659

    CPU 6 DPC total execution time s: 0.235917

    CPU 6 DPC count: 28253

    _________________________________________________________________________________________________________

    CPU 7 Interrupt cycle time s: 68.709382

    CPU 7 ISR highest execution time µs: 0.0

    CPU 7 ISR total execution time s: 0.0

    CPU 7 ISR count: 0

    CPU 7 DPC highest execution time µs: 364.1250

    CPU 7 DPC total execution time s: 0.050274

    CPU 7 DPC count: 8058

    _________________________________________________________________________________________________________

    CPU 8 Interrupt cycle time s: 63.010706

    CPU 8 ISR highest execution time µs: 0.0

    CPU 8 ISR total execution time s: 0.0

    CPU 8 ISR count: 0

    CPU 8 DPC highest execution time µs: 338.260870

    CPU 8 DPC total execution time s: 0.079827

    CPU 8 DPC count: 11977

    _________________________________________________________________________________________________________

    CPU 9 Interrupt cycle time s: 74.330280

    CPU 9 ISR highest execution time µs: 0.0

    CPU 9 ISR total execution time s: 0.0

    CPU 9 ISR count: 0

    CPU 9 DPC highest execution time µs: 254.317029

    CPU 9 DPC total execution time s: 0.024898

    CPU 9 DPC count: 3216

    _________________________________________________________________________________________________________

    CPU 10 Interrupt cycle time s: 58.096266

    CPU 10 ISR highest execution time µs: 0.0

    CPU 10 ISR total execution time s: 0.0

    CPU 10 ISR count: 0

    CPU 10 DPC highest execution time µs: 347.404891

    CPU 10 DPC total execution time s: 0.077355

    CPU 10 DPC count: 10215

    _________________________________________________________________________________________________________

    CPU 11 Interrupt cycle time s: 70.788779

    CPU 11 ISR highest execution time µs: 0.0

    CPU 11 ISR total execution time s: 0.0

    CPU 11 ISR count: 0

    CPU 11 DPC highest execution time µs: 170.879529

    CPU 11 DPC total execution time s: 0.03330

    CPU 11 DPC count: 4590

    _________________________________________________________________________________________________________

    :)
     
    HarryMecha, Nov 30, 2020
    #1

  2. DPC Latency High

    Hi,

    Check these:

    Solving DPC Latency Issues - Download Latency Monitor and DPC Latency Checker

    Solving DPC Latency Issues | Sweetwater

    DPC Latency Checker

    Troubleshoot Driver Problems Using DPC Latency Checker | Free Easy-to-Follow Windows Tutorials

    DPC Latency Checker - Download

    http://www.thesycon.de/eng/latency_check.shtml

    Hope this helps.

    --------------------------------------------------------------------------------------------

    Rob Brown -
    Microsoft MVP
    <- profile - Windows and Devices for IT : Bicycle - Mark Twain said it right.
     
    SpiritX MS MVP, Nov 30, 2020
    #2
  3. DPC latency audio problem

    If the issue continues in Safe mode, that suggests an there might be an issue with basic drivers.
    I was wondering about your chipset drivers version. It appears there was an update on 01/20/2020, could you verify your chipset drivers version?

    PRIME X470-PRO Driver & Tools | Motherboards | ASUS Canada



    Open device manager, expand System devices.



    DPC Latency problems [​IMG]



    Locate Chipset controller, right-click, and select properties.



    DPC Latency problems [​IMG]



    Select Driver tab.



    DPC Latency problems [​IMG]
     
    W10 Tweaker, Nov 30, 2020
    #3
  4. syndiate Win User

    DPC Latency problems

    Windows 10: High DPC latency (ndis.sys)

    Recently, my audio has been crackling and popping and glitching, and I wanted to see what the fuss was all about. I tried everything. Until I found out that my DPC latency was dangerously high. I ran it through the DPC Latency Checker and LatencyMon, and
    apparently the problem was "ndis.sys". I've literally tried EVERYTHING. Here's a list of what I've done to resolve this problem:

    • Updating drivers
    • Changing the power plan
    • Disabling the dynamic ticking
    • Updating the graphics cards drivers
    • Disabling Firewall
    • Disabling IPv6
    • Uninstalling Bonjour
    • Disabling Energy Efficient Ethernet
    • Disabling/re-enabling drivers
    • Adding PerfLevelSrc, PowerMizerEnable, PowermizerLevel, and PowermizerLevelAC values to Registry Editor
    • Uninstalling antivirus software
    • Modifying the "Start" value in the Registry Editor's value to 4
    UPDATE: Recently, the DPC latency has declined, which is good, however it still sometimes has latency-spikes and I still don't have proper DPC latency.

    COMPUTER SPECS:

    OS: Windows 10 Home version 1909

    Computer Model: Dell Inspiron 3668

    Processor: Intel(R) Core(TM) i3-7100 CPU @3.90 GhZ 3.91 GhZ

    RAM: 8 GB

    Graphics Driver: Intel(R) HD Graphics 630

    Audio Driver: Realtek High Definition Audio

    DPC latency (updated):


    DPC Latency problems 6239bb93-1397-49f9-815d-6b930532b8f4?upload=true.png
     
    syndiate, Nov 30, 2020
    #4
Thema:

DPC Latency problems

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